TMS320VC5504 datasheet(121/128 Pages) TI

121 / 128 page

6.18.2

GPIO Peripheral Input/Output Electrical Data/Timing

GP[x] Input

(With IOINTEDGy = 0)

GP[x] Output

GP[x] Input

(With IOINTEDGy = 1)

TMS320VC5504

Fixed-Point Digital Signal Processor

www.ti.com

SPRS609A – JUNE 2009 – REVISED JULY 2009

Table 6-44. Timing Requirements for GPIO Inputs(1) (see Figure 6-31)

CVDD = 1.05 V

CVDD = 1.3 V

NO.

UNIT

MIN

MAX

tw(ACTIVE)

Pulse duration, GPIO input/external interrupt pulse active

2C(1)(2)

tw(INACTIVE)

Pulse duration, GPIO input/external interrupt pulse inactive

C (1)(2)

(1)

The pulse width given is sufficient to get latched into the GPIO_IFR register and to generate an interrupt. However, if a user wants to

have the device recognize the GPIO changes through software polling of the GPIO Data In (GPIO_DIN) register, the GPIO duration

must be extended to allow the device enough time to access the GPIO register through the internal bus.

(2)

C = SYSCLK period in ns. For example, when running parts at 100 MHz, use C = 10 ns.

Table 6-45. Switching Characteristics Over Recommended Operating Conditions for GPIO Outputs

(see Figure 6-31)

CVDD = 1.05 V

CVDD = 1.3 V

NO.

PARAMETER

UNIT

MIN

MAX

tw(GPOH)

Pulse duration, GP[x] output high

3C(1)(2)

tw(GPOL)

Pulse duration, GP[x] output low

3C(1)(2)

(1)

This parameter value should not be used as a maximum performance specification. Actual performance of back-to-back accesses of the

GPIO is dependent upon internal bus activity.

(2)

C = SYSCLK period in ns. For example, when running parts at 100 MHz, use C = 10 ns.

Figure 6-31. GPIO Port Timing

Submit Documentation Feedback

Peripheral Information and Electrical Specifications

121

TMS320VC5504 Datasheet(PDF) 121 Page - Texas Instruments

TMS320VC5504 Datasheet(HTML) 121 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL